Merge branch 'master' into simplify-fk-modeling

frontend/src/visualizations/components/ChartWithLegend.jsx

frontend/src/visualizations/components/Legend.css

frontend/src/visualizations/components/LegendItem.jsx

frontend/src/visualizations/components/LineAreaBarChart.jsx

frontend/src/visualizations/components/Visualization.jsx

npm-shrinkwrap.json

package.json

project.clj

resources/frontend_client/app/card/partials/card_detail.html

src/metabase/api/field.clj

src/metabase/db/migrations.clj

src/metabase/driver/bigquery.clj

src/metabase/driver/druid/query_processor.clj

src/metabase/driver/mongo.clj

src/metabase/driver/mongo/util.clj

src/metabase/metabot.clj

src/metabase/routes.clj

src/metabase/util.clj

test/metabase/api/field_test.clj

test/metabase/test/data/bigquery.clj